San Diego County, San Diego Rat Control Situation:
Hi David, Is a UV blacklight still useful, exterior-wise, if it rains after the rodents leave their urine stains? I am in the process of performing exterior maintenance to better exclude my roof rats. 1) I have a 25 year old cedar shake roof in San Diego California with openings under each shake along the rake edge of the roof at the gable ends of my house. There's no drip edge, i.e. under the shakes I have roofing paper (now somewhat curled) that runs more or less up to and rests right atop the fascia board. Because I have skip sheathing, and since the cross section of a shake is a wedge that is up to one inch at the upper, thick end, this appears to create many huge entry points along the rake edges even though the sheathing is rabbeted into the fascia board. As a result, I'm thinking of getting a UV blacklight to use outside the house to sleuth for urine stains along the upper edge of the gable end shakes and fascia boards. My question is, how easily does the winter rain wash away the urine, rendering this a pointless exercise? 2) I noticed a new product called "rat-out gel" and was thinking of applying it along the rake edges mentioned above. Or, maybe I should just buy many rolls of X-Clude and use that instead. Or maybe both. Any comment? Thanks very much for your website, Doug
My response: First off, I do not have experience using UV lights to detect rat urine. But I do suspect that rain will severely limit the effectiveness of this approach. I have never heard of Rat-Out Gel or XClude, but I typically stick to physical barriers rather than repellent type devices. If your roof makes this impossible, you might have a tough time keeping the rats out.
San Diego Rat Control Tip of The Week
Can Rats Make Chirping Noises?
Rats are nocturnal animals; they avoid brightly lit places at all costs and prefer damp, dark places out of sight. But because of their great agility and incredible dexterity, they can fit into any place and their presence will be almost imperceptible, due to the low sound frequency they emit.
Rats Communicate
Although they obviously cannot talk, rats have the ability to communicate through pheromones, which are chemical substances secreted by living beings; they use these to warn other rats about any danger. Also, they use vocalizations (almost imperceptible sounds), to associate with pain, discomfort, or uneasiness.
They have other sounds in a higher ultrasonic frequency to identify well-being. It is said that there are specific interactions using a shriek; sexual activities, communication between mother and pup, or situations where the aggressiveness of other rats can be identified.
So Are Rats' Sounds Really Imperceptible?
Their sound is almost imperceptible to the human ear, but among them, this form of communication is very powerful. Their senses of smell, touch, and hearing are highly developed and this is what allows them to walk so boldly through the night.
But if we pay attention and are close enough, we can perhaps hear their gnawing, prowling, and even fighting movements. Just keep in mind that if you are close enough to perceive their screeching, it is because the rat feels in danger and these animals, unlike mice, can attack!
Can This Squeak Affect The Human Ear?
These sounds could not affect in any way your ear; but it may affect our well-being, as their sound can attract more and more rats over time, and this can become a real headache.
Surely you don't want to have a family of rats hanging around your house, your kitchen, or your restaurant. The best thing to do is get rid of rats as soon as you realize they are present in your property.
